Update to 1.138
    
    - New upstream release 1.138
      - RequireCheckingReturnValueOfEval didn't count returning the result of an
        eval as checking it - now it does; however, it's only if you "return eval
        { ... }" - it still doesn't handle the case of "return ( eval {} )"
        (GH#324)
      - ProhibitPunctuationVars would get confused and think that the expression
        qr/SOME$/ was using the $/ special variable (GH#843)